Question: The surface z 2 = x 2 + y 2 - 4 x + 5 remains unchanged when rotated about the line L in R

The surface z2=x2+y2-4x+5 remains unchanged when rotated about the line L in R3. Which of the following could be parametric equations for L?
x=-2,y=0,z=t
x=2,y=0,z=t
x=-2t,y=0,z=1
x=2t,y=0,z=1
The surface z 2 = x 2 + y 2 - 4 x + 5 remains

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